215/45R18 tire size

A 215/45R18 tire is 25.62 in (650.7 mm) tall and 8.46 in (215.0 mm) wide, and turns 787 revolutions per mile.

• 25.62 inOverall diameter
• 3.81 inSidewall height
• 787Revolutions per mile
• 25.6x8.5R18Flotation equivalent

215/45R18 is a 18-inch tire with a 215 mm (8.46 in) section width and a 45% aspect ratio, giving a 3.81-inch sidewall and a flotation-style size of about 25.6x8.5R18.

Its overall diameter is 25.62 inches, so it rolls 80.5 inches per revolution and turns about 787 times per mile.

60 other sizes in this list are within 3% of that diameter.

Compare 215/45R18 with plausible swaps

• 205/60R16 vs 215/45R18 (+0.26%)
• 225/55R16 vs 215/45R18 (+0.49%)
• 215/50R17 vs 215/45R18 (−0.60%)
• 275/40R17 vs 215/45R18 (+0.17%)
• 245/45R17 vs 215/45R18 (+0.25%)
• 225/50R17 vs 215/45R18 (+0.94%)
• 215/40R18 vs 215/45R18 (−3.30%)
• 235/40R18 vs 215/45R18 (−0.85%)
• 275/35R18 vs 215/45R18 (−0.15%)
• 215/45R18 vs 245/40R18 (+0.38%)
• 215/45R18 vs 285/35R18 (+0.92%)
• 215/45R18 vs 225/45R18 (+1.38%)
• 215/45R18 vs 235/45R18 (+2.77%)
• 215/45R18 vs 215/50R18 (+3.30%)
• 215/45R18 vs 235/35R19 (−0.55%)
• 215/45R18 vs 275/30R19 (−0.48%)
• 215/45R18 vs 285/30R19 (+0.45%)
• 215/45R18 vs 245/35R19 (+0.52%)
• 215/45R18 vs 225/30R20 (−1.18%)

Sizes within 3% of 25.62 in diameter

• 225/60R15 25.63 in (+0.05%)
• 275/35R18 25.58 in (−0.15%)
• 275/40R17 25.66 in (+0.17%)
• 245/45R17 25.68 in (+0.25%)
• 205/60R16 25.69 in (+0.26%)
• 245/40R18 25.72 in (+0.38%)
• 195/75R14 25.52 in (−0.40%)
• 285/30R19 25.73 in (+0.45%)
• 275/30R19 25.50 in (−0.48%)
• 225/55R16 25.74 in (+0.49%)
• 205/65R15 25.49 in (−0.49%)
• 195/70R15 25.75 in (+0.51%)
• 245/35R19 25.75 in (+0.52%)
• 235/35R19 25.48 in (−0.55%)
• 215/50R17 25.46 in (−0.60%)
• 235/40R18 25.40 in (−0.85%)
• 215/70R14 25.85 in (+0.91%)
• 285/35R18 25.85 in (+0.92%)
• 225/50R17 25.86 in (+0.94%)
• 205/55R17 25.88 in (+1.01%)
• 265/40R17 25.35 in (−1.06%)
• 235/45R17 25.33 in (−1.14%)
• 225/30R20 25.31 in (−1.18%)
• 215/55R16 25.31 in (−1.20%)
• 265/35R18 25.30 in (−1.23%)
• 205/70R14 25.30 in (−1.24%)
• 295/30R19 25.97 in (+1.37%)
• 225/45R18 25.97 in (+1.38%)
• 265/30R19 25.26 in (−1.40%)
• 215/65R15 26.00 in (+1.51%)
• 255/30R20 26.02 in (+1.58%)
• 195/60R16 25.21 in (−1.58%)
• 255/35R19 26.03 in (+1.60%)
• 255/40R18 26.03 in (+1.61%)
• 255/45R17 26.04 in (+1.63%)
• 225/35R19 25.20 in (−1.63%)
• 215/60R15 25.16 in (−1.80%)
• 225/40R19 26.09 in (+1.83%)
• 235/60R15 26.10 in (+1.89%)
• 205/75R14 26.11 in (+1.91%)
• 295/35R18 26.13 in (+2.00%)
• 225/40R18 25.09 in (−2.07%)
• 215/60R16 26.16 in (+2.11%)
• 205/50R17 25.07 in (−2.14%)
• 225/35R20 26.20 in (+2.27%)
• 305/30R19 26.20 in (+2.29%)
• 255/40R17 25.03 in (−2.29%)
• 255/35R18 25.03 in (−2.31%)
• 255/30R19 25.02 in (−2.32%)
• 235/50R17 26.25 in (+2.47%)
• 195/65R15 24.98 in (−2.49%)
• 265/30R20 26.26 in (+2.50%)
• 225/45R17 24.97 in (−2.52%)
• 205/70R15 26.30 in (+2.66%)
• 265/35R19 26.30 in (+2.67%)
• 215/55R17 26.31 in (+2.70%)
• 235/45R18 26.33 in (+2.77%)
• 265/40R18 26.35 in (+2.84%)
• 205/55R16 24.88 in (−2.89%)
• 225/50R16 24.86 in (−2.97%)

Open 215/45R18 in the tire size calculator

Source: Calculated from standard tire geometry formulas. Verified 2026-09-27. How these numbers are calculated.